Question

The area of a rectangular lawn is 225m square. If it's length is 15 m, find it's perimeter?​

Answer 1

Answer:

area of rectangle = l×b

225=15×b

225/15=b

15=b

Answer 2

$\huge\bf\pink{Solution:-}$

$\huge\bf\red{Explanation:-}$

$\huge\bf\pink{Given:-}$

• Area of rectangular lawn = 225m²
• Length = 15m

$\huge\bf\red{To find :-}$

• Perimeter of rectangle lawn

$\huge\bf\pink{Formulaes:-}$

• Perimeter of rectangle = 2(l+b)

Where

L = length

B = breadth

• Area of recatngle = length × breadth

By using above formulaes We can do

$\huge\bf\red{Lets do !}$

As we know area of rectangle lawn is 225m²

But according to formula area of rectangle lawn is l×b

So,

l × b = 225m²

15 m × b = 225m²

b = 225m²/15m

b = 15m

So, breadth of rectangle lawn is 15 m

So, we can find perimeter

• Length = 15m
• Breadth = 15m

Perimeter = 2 (l +b)

Perimeter = 2 (15m+15m)

Perimeter = 2(30m)

Perimeter = 60m

So, perimeter of rectangle lawn is 60m

$\huge\bf\pink{Know more}$

• Perimeter of square = 4a
• Perimeter of equilateral triangle = 3a
• Perimeter of scalene triangle = a+b+c
• Perimeter of Iscoceles Triangle = 2a + b
• Perimeter of rhombus = 4a
• Perimeter of parallelogram = 2 (a+b)

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